spf1.sage.com has no CNAME records.
Question and response
Question
dig spf1.sage.com. NS
Answer
The response has no answer records.
Authority
sage.com. 1800 SOA rita.ns.cloudflare.com. dns.cloudflare.com. 2397516553 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0